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Dual Battery Monitor with Alarm

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now $134.00 inc GST

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DOL_NLBMDA - Dual Battery Monitor with Alarm

National Luna Dual Battery Monitor with Alarm (suit all types of Dual Battery Systems and can also be used to measure 2 x 12v batteries in a 24v system)

National Luna Dual Battery Monitors are ideal for monitoring 2 lead-acid batteries in a single installation such as dual-battery systems in 4x4's and campers. The digital technology used in the dual monitors allows the non-linear characteristics of lead-acid batteries to be accurately followed.

A feature of one of the National Luna dual battery monitors is the independent negative - allowing this particular model to be used in vehicles with 24V systems. Dual battery monitors can be used independently, or in combination with any dual-battery system.


  • Simple installation
  • 2 individual battery displays
  • Excessive discharge warning
  • Over-charge warning
  • Polarity protected
  • Extremely low power consumption
  • 11.4V to 15V operation (ideal for automotive use)
  • Programmed for non-linear lead-acid battery characteristics
  • Audible alarm as standard (can be muted)
  • Display on/off feature (Sleep mode)
  • Recessed version available for panel-mounting
  • 3.5-metre cable (standard)   



Physical size 107mm (l) x 48mm (w) x 20mm (h)
Weight 185g (dual monitor)
Power supply 8Vdc - 15Vdc (display range: 11.4V - 14.2V)
Low-voltage warning
DC voltage below 11.4V
Over-charge warning DC voltage above 14.65V
Cable Dual monitor - Fixed 3.5 meter 4-core cable
Dual Controller - Removeable 3.5 meter 4-core cable
Power consumption
8mA (sleep mode-option) , 35mA Average
40mA max


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